CN116712642A - Self-excitation type needleless injection pusher - Google Patents
Self-excitation type needleless injection pusher Download PDFInfo
- Publication number
- CN116712642A CN116712642A CN202310727943.3A CN202310727943A CN116712642A CN 116712642 A CN116712642 A CN 116712642A CN 202310727943 A CN202310727943 A CN 202310727943A CN 116712642 A CN116712642 A CN 116712642A
- Authority
- CN
- China
- Prior art keywords
- gun body
- assembly
- body assembly
- injection
- push rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 107
- 239000007924 injection Substances 0.000 title claims abstract description 107
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000004146 energy storage Methods 0.000 claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 239000004973 liquid crystal related substance Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000452 restraining effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 2
- 102000018997 Growth Hormone Human genes 0.000 description 1
- 108010051696 Growth Hormone Proteins 0.000 description 1
- 102000004877 Insulin Human genes 0.000 description 1
- 108090001061 Insulin Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000122 growth hormone Substances 0.000 description 1
- 229940125396 insulin Drugs 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
Abstract
The invention relates to a self-excitation type needleless injection pusher, which comprises a shell, an injection mechanism, an elastic piece group and a locking mechanism, wherein the shell comprises a first gun body component and a second gun body component which are in sliding fit; the injection mechanism comprises an injection tube and a push rod assembly, and the injection tube is arranged at the end part of the second gun body assembly, which is far away from the first gun body assembly; the push rod component is slidingly matched in the shell and is used for pushing the injection in the injection tube to inject; the elastic piece group comprises an energy storage elastic piece arranged between the second gun body component and the push rod component and an excitation elastic piece arranged between the first gun body component and the second gun body component; the locking mechanism is used for locking the push rod assembly when the second gun body assembly is located at the first position and unlocking the push rod assembly when the second gun body assembly slides from the first position to the second position towards the first gun body assembly. The invention can perform self-excitation when the force of the injection part is pressed against the injection part to a preset degree, thereby improving the injection effect.
Description
Technical Field
The invention relates to the field of needleless injection, in particular to a self-excitation needleless injection pusher.
Background
When subcutaneous liquid medicine (insulin, growth hormone, vaccine and the like) is injected, a needleless injector is often used, an injection tube is abutted against a part to be injected when the existing needleless injector is injected, then an excitation button is pressed to complete excitation injection, the injection tube is abutted against the part to be injected, a user generally has no clear how hard the injection tube should be abutted against, the abutted force is not well controlled, if the abutted force is smaller, the excitation effect is not good, even the liquid medicine cannot enter the skin, if the abutted force is larger, the injection tube is deeper, the bleeding phenomenon and the like occur. The existing needleless injector cannot control the force of the injector to tightly prop against the injection part, so that the injection effect is not ideal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a self-excitation type needleless injection pusher which can perform self-excitation when the force of the self-excitation type needleless injection pusher against a part to be injected reaches a preset degree, so as to improve the injection effect.
In order to solve the technical problems, the technical scheme of the invention is as follows: a self-exciting needleless injection pusher comprising:
a housing including a first gun body assembly and a second gun body assembly in sliding engagement, the second gun body assembly having a first position and a second position;
the injection mechanism comprises an injection tube and a push rod assembly, wherein the injection tube is arranged at the end part of the second gun body assembly, which is far away from the first gun body assembly, and is used for accommodating injection; the push rod assembly is slidably matched in the shell and is used for pushing the injection in the injection tube to inject;
the elastic piece group comprises an energy storage elastic piece arranged between the second gun body assembly and the push rod assembly to tightly prop against the push rod assembly and an excitation elastic piece arranged between the first gun body assembly and the second gun body assembly;
the locking mechanism is used for locking the push rod assembly when the second gun body assembly is located at the first position, and unlocking the push rod assembly when the second gun body assembly slides from the first position to the second position from the first position to the first gun body assembly against the resistance of the excitation elastic piece so that the push rod assembly moves towards the injection tube under the action of the energy storage elastic piece.
There is further provided a specific structure of a locking mechanism, the locking mechanism comprising:
the peripheral wall of the second gun body assembly is provided with embedded holes corresponding to the steel balls one by one, and the steel balls are embedded in the embedded holes;
a constraining cavity disposed in the first gun body assembly and a tapered surface disposed in the pushrod assembly; wherein, the liquid crystal display device comprises a liquid crystal display device,
when the second gun body assembly is positioned at the first position, the steel ball is opposite to the inner wall of the constraint cavity and is propped against the inner wall of the constraint cavity to protrude inwards from the embedded hole so as to prop against the conical surface of the push rod assembly;
and in the process that the second gun body assembly slides from the first position to the second position, the steel ball gradually enters and breaks away from the constraint cavity and moves outwards under the pushing of the conical surface until the push rod assembly is not interfered to move towards the injection tube.
Further to enable multiple reuse of the self-priming needleless injection pusher, the second gun body assembly comprises:
the inner sleeve assembly is in sliding fit with the first gun body assembly, and the energy storage elastic piece is arranged between the push rod assembly and the inner sleeve assembly;
the outer sleeve component is sleeved outside the inner sleeve component and is in threaded connection with the inner sleeve component, and the injection tube is arranged on the outer sleeve component.
The self-excitation type needleless injection pusher further comprises a steel ball falling-off prevention mechanism which is positioned in the first gun body assembly and comprises a top piece and a falling-off prevention elastic piece, wherein one end of the falling-off prevention elastic piece is connected with the first gun body assembly, and the other end of the falling-off prevention elastic piece is connected with the top piece; wherein, the liquid crystal display device comprises a liquid crystal display device,
when the push rod assembly is in a locked state, the push rod assembly compresses the anti-falling elastic piece through the top piece;
after the push rod assembly is unlocked, the top piece stretches to prop against the inner side of the steel ball under the action of the anti-falling elastic piece.
Further, in order to prevent the energy storage elastic member from rotating when the inner sleeve assembly and the first gun body assembly rotate relative to the outer sleeve assembly, a bearing is arranged between the inner sleeve assembly and the energy storage elastic member.
There is further provided a specific construction of a jacket assembly, the jacket assembly comprising:
a convex lens sleeve configured with a lens;
the main sleeve is assembled in the convex lens sleeve and stretches into the first gun body assembly, a perspective hole matched with the lens is further formed in the main sleeve, and the inner sleeve assembly is in threaded connection with the main sleeve.
Further, the outer sleeve assembly also includes a positioning sleeve disposed between the main sleeve and the first gun body assembly.
Further to prevent false activation of the self-activating needleless injection pusher, the self-activating needleless injection pusher further includes a safety mechanism for preventing sliding of the second gun body assembly toward the first gun body assembly when the self-activating needleless injection pusher is in the operative position.
There is further provided a specific structure of a safety mechanism comprising:
the safety button is inserted into the first gun body assembly and protrudes outwards from the first gun body assembly;
the safety ring is connected with the safety button;
a safety elastic piece arranged between the side of the safety ring, which is far away from the safety button, and the first gun body component; wherein, the liquid crystal display device comprises a liquid crystal display device,
when the safety button is not pressed, the safety ring is in a working position under the pushing of the safety elastic piece and is blocked between corresponding parts of the first gun body assembly and the second gun body assembly;
when the safety button is pressed, the safety ring overcomes the resistance of the safety elastic piece and moves to the position that the second gun body assembly is not interfered to slide towards the first gun body assembly.
Further to provide protection for the syringe, the self-priming needleless injection pusher further includes a cap that is mounted over the end of the second gun body assembly remote from the first gun body assembly and covers the syringe.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. the invention can perform self-excitation when the force of the injection tube against the injection part reaches a preset degree, thereby improving the injection effect and being convenient for a user to operate and use;
2. the self-excitation type needleless injection pusher can perform energy storage, liquid feeding and excitation operations and can be repeatedly used.
Drawings
FIG. 1 is a schematic view of the self-exciting needleless injection pusher of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
fig. 3 is an enlarged view of a portion a of fig. 2;
FIG. 4 is a schematic view of a first gun body assembly according to the present invention;
FIG. 5 is a schematic view of the construction of the jacket assembly of the present invention;
FIG. 6 is a schematic view of the inner housing assembly and the push rod assembly of the present invention and the energy storage elastic member;
in the figure, 1, a first gun body assembly; 2. a second gun body assembly; 21. an inner sleeve assembly; 22. a jacket assembly; 221. a convex lens sleeve; 222. a lens; 223. a main sleeve; 224. a positioning sleeve; 3. an injection mechanism; 31. an injection tube; 32. a push rod assembly; 4. capping; 5. an energy storage elastic member; 6. exciting the elastic member; 7. a locking mechanism; 71. a steel ball; 72. a confinement chamber; 73. a conical surface; 8. a steel ball falling-off prevention mechanism; 81. a top piece; 82. an anti-falling elastic member; 9. a bearing; 10. a safety mechanism; 101. an insurance button; 102. a safety ring; 103. and a safety elastic piece.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
As shown in fig. 1, 2, 3, 4, 5, 6, a self-exciting needleless injection pusher comprising:
a housing comprising a first gun body assembly 1 and a second gun body assembly 2 in sliding fit, the second gun body assembly 2 having a first position and a second position;
the injection mechanism 3 comprises an injection tube 31 and a push rod assembly 32, wherein the injection tube is arranged at the end part of the second gun body assembly 2 far away from the first gun body assembly 1 and is used for accommodating injection; a push rod assembly 32 slidably fitted in the housing for pushing the injection liquid in the injection liquid tube 31 for injection during movement toward the injection liquid tube 31;
an elastic member group including an energy storage elastic member 5 arranged between the second gun body assembly 2 and the push rod assembly 32 to abut against the push rod assembly 32 and an excitation elastic member 6 arranged between the first gun body assembly 1 and the second gun body assembly 2;
the locking mechanism 7 is used for locking the push rod assembly 32 when the second gun body assembly 2 is located at the first position, and unlocking the push rod assembly 32 when the second gun body assembly 2 slides from the first position to the second position towards the first gun body assembly 1 against the resistance of the excitation elastic piece 6 so that the push rod assembly 32 moves towards the injection tube 31 under the action of the energy storage elastic piece 5.
Specifically, during injection, the first gun body assembly 1 is held by hand, the injection tube 31 is tightly attached to the part to be injected, when the force of the injection tube 31 against the part to be injected breaks through the resistance of the excitation elastic piece 6 to enable the second gun body assembly 2 to move to the second position, the locking mechanism 7 automatically releases the locking of the push rod assembly 32, the push rod assembly 32 moves towards the injection tube 31 under the action of the energy storage elastic piece 5, the injection in the injection tube 31 is pushed to be injected, and the injection tube 31 can be self-excited when the force of the injection tube 31 against the part to be injected reaches a preset degree, so that the injection effect is improved, and the injection device is convenient for a user to operate and use.
Wherein, the energy storage elastic piece 5 and the excitation elastic piece 6 can be springs.
In one embodiment, as shown in fig. 2 and 3, the locking mechanism 7 includes:
at least two steel balls 71, the peripheral wall of the second gun body assembly 2 is provided with embedded holes corresponding to the steel balls 71 one by one, and the steel balls 71 are embedded in the embedded holes;
a confinement chamber 72 disposed in the first gun body assembly 1 and a tapered surface 73 disposed in the pusher assembly 32; wherein, the liquid crystal display device comprises a liquid crystal display device,
when the second gun body assembly 2 is positioned at the first position, the steel ball 71 is opposite to the inner wall of the constraint cavity 72 and is propped against the conical surface 73 protruding inwards from the embedded hole by the inner wall of the constraint cavity 72 so as to prop against the push rod assembly 32;
during sliding of the second gun body assembly 2 from the first position toward the second position, the steel ball 71 gradually enters the disengagement chamber 72 and moves outwardly under the urging of the tapered surface 73 to not interfere with movement of the push rod assembly 32 toward the syringe 31.
In this embodiment, the insert holes are configured so as not to allow the steel balls 71 to escape from the outside thereof, and the steel balls 71 may be 2, 3, 4, 5, etc. and are uniformly distributed along the peripheral wall of the second gun body assembly 2. The restraining cavity 72 is a cylindrical cavity, the first gun body assembly 1 is further provided with a conical cavity above the restraining cavity 72, the inner diameter of the conical cavity is gradually increased from bottom to top, the steel ball 71 gradually enters the restraining cavity 72 and moves outwards into the conical cavity under the pushing of the conical surface 73 in the sliding process of the second gun body assembly 2 from the first position to the second position, and the conical cavity provides a space for the steel ball 71 to move outwards. The taper may have a slope greater than the slope of the tapered surface 73.
It should be noted that the structure of the locking mechanism 7 is not limited to the above description, but may be other structures. For example, the steel ball is replaced with a pin.
In one embodiment, as shown in fig. 1, 2, and 3, the self-activating needleless injection pusher further comprises a safety mechanism 10, the safety mechanism 10 being configured to prevent the second gun body assembly 2 from sliding toward the first gun body assembly 1 when the safety mechanism is in the operative position. By the arrangement, false excitation can be effectively prevented.
As shown in fig. 2 and 3, the safety mechanism 10 includes:
the safety button 101 is inserted into the first gun body assembly 1 and protrudes outwards from the first gun body assembly 1;
a safety ring 102 connected to the safety button 101;
a safety elastic member 103 disposed between the safety button 101 side of the safety ring 102 and the first gun body assembly 1; wherein, the liquid crystal display device comprises a liquid crystal display device,
when the safety button 101 is not pressed, the safety ring 102 is in a working position under the pushing of the safety elastic piece 103 and is blocked between the corresponding parts of the first gun body assembly 1 and the second gun body assembly 2;
when the safety button 101 is pressed, the safety ring 102 moves against the resistance of the safety elastic member 103 so as not to interfere with the sliding of the second gun body assembly 2 toward the first gun body assembly 1.
Specifically, the self-activating needleless injection pusher may be activated only if the safety button 101 is held down.
In one embodiment, as shown in fig. 1 and 2, the self-activating needleless injection pusher further comprises a cap 4, the cap 4 being mounted over the end of the second gun body assembly 2 remote from the first gun body assembly 1 and covering the injection tube 31. By this arrangement, the injection tube 31 can be protected, and contamination can be effectively prevented.
Example two
As shown in fig. 2, 5 and 6, in this embodiment, based on the first embodiment, the second gun body assembly 2 includes:
the inner sleeve assembly 21 is slidably matched with the first gun body assembly 1, the energy storage elastic piece 5 is arranged between the push rod assembly 32 and the inner sleeve assembly 21, and the embedded hole is arranged on the peripheral wall of the inner sleeve assembly 21;
the outer sleeve assembly 22 is sleeved outside the inner sleeve assembly 21 and is in threaded connection with the inner sleeve assembly 21, and the injection tube 31 is arranged on the outer sleeve assembly 22.
The device is arranged in such a way that the self-excitation type needleless injection pusher can store energy again for the energy storage elastic piece 5 after completing excitation so as to perform the next excitation and can be repeatedly used for a plurality of times.
The self-excitation needleless injection pusher has three processes of excitation, energy storage and liquid feeding, and is recycled for multiple times according to excitation-energy storage-liquid feeding-excitation-energy storage-liquid feeding … …; wherein, the liquid crystal display device comprises a liquid crystal display device,
excitation process: holding the first gun body assembly 1 by hand, abutting the injection tube 31 against the part to be injected, sliding the second gun body assembly 2 relative to the first gun body assembly 1 towards the first gun body assembly 1, compressing and exciting the elastic piece 6, unlocking the push rod assembly 32 by the locking mechanism 7 when the second gun body assembly 2 moves to the second position, moving the push rod assembly 32 towards the injection tube 31 under the action of the energy storage elastic piece 5, and pushing the injection in the injection tube 31 to be ejected;
the energy storage process comprises the following steps: one holds the first gun body assembly 1, the other holds the second gun body assembly 2, then rotates the first gun body assembly 1 or the second gun body assembly 2 towards the corresponding direction, so that the outer sleeve assembly 22 pushes the push rod assembly 32 to move towards the first gun body assembly 1 and the inner sleeve assembly 21 until the push rod assembly 32 is locked by the locking mechanism, and in the process, the energy storage elastic piece 5 is compressed to finish energy storage;
the liquid inlet process comprises the following steps: one holds the first gun body assembly 1, the other holds the second gun body assembly 2, then rotates the first gun body assembly 1 or the second gun body assembly 2 towards the corresponding direction, so that the outer sleeve assembly 22 moves back to the first gun body assembly 1 and the inner sleeve assembly 21, in the process, the push rod assembly 32 is pulled out from the injection tube 31, and the injection enters the injection tube 31 under the action of negative pressure.
Wherein, the inner wall of first rifle body subassembly 1 is equipped with the spout, and endotheca subassembly 21 outer wall is equipped with the draw runner, and draw runner sliding fit is in the spout, and on the one hand makes things convenient for endotheca subassembly 21 and even whole second rifle body subassembly 2 to take place to slide for first rifle body subassembly 1, on the other hand, can guarantee when rotating first rifle body subassembly 1, endotheca subassembly 21 can be carried by first rifle body subassembly 1 and rotate.
In one embodiment, as shown in fig. 2 and 4, the self-excitation needleless injection pusher further comprises a steel ball falling-off prevention mechanism 8, wherein the steel ball falling-off prevention mechanism 8 is positioned in the first gun body assembly 1 and comprises a top piece 81 and a falling-off prevention elastic piece 82, one end of the falling-off prevention elastic piece 82 is connected with the first gun body assembly 1, and the other end is connected with the top piece 81; wherein, the liquid crystal display device comprises a liquid crystal display device,
when the push rod assembly 32 is in the locked state, the push rod assembly 32 compresses the falling-off prevention elastic member 82 through the top member 81;
after the push rod assembly 32 is unlocked, the top member 81 is extended to abut against the inner side of the steel ball 71 by the falling-off prevention elastic member 82.
By the arrangement, the steel ball 71 can be effectively prevented from falling off from the inner side of the embedded hole after the push rod assembly 32 is released, and the whole self-excitation type needleless injection pusher is beneficial to multiple stable and reliable use.
After the push rod assembly 32 is unlocked, the top member 81 extends to abut against the inner side of the steel ball 71 under the action of the anti-falling elastic member 82, at this time, the outer side of the steel ball 71 enters and is clamped in the tapered cavity, and the inner sleeve assembly 21 of the second gun body assembly 2 is maintained at the second position due to the limitation of the steel ball 71. During the movement of the push rod assembly 32 towards the first gun body assembly 1 for resetting, the top member 81 is jacked up and the conical cavity facilitates the resetting of the steel ball 71 to a position in which it is in engagement with the conical surface 73.
In one embodiment, as shown in fig. 1 and 6, a bearing 9 is provided between the inner sleeve assembly 21 and the energy accumulating elastic member 5.
The bearing 9 is generally a thrust ball bearing, and the bearing 9 is arranged to prevent the energy storage elastic member 5 from rotating when the inner sleeve assembly 21 and the first gun body assembly 1 rotate relative to the outer sleeve assembly 22.
In one embodiment, as shown in fig. 2 and 5, the outer sleeve assembly 22 includes:
a convex lens sleeve 221 provided with a lens 222;
the main sleeve 223 is assembled in the convex lens sleeve 221 and extends into the first gun body assembly 1, and is also provided with a perspective hole matched with the lens 222, and the inner sleeve assembly 21 is in threaded connection with the main sleeve 223.
As shown in fig. 2 and 5, the outer jacket assembly 22 further includes a positioning sleeve 224, the positioning sleeve 224 being disposed between the main sleeve 223 and the first gun body assembly 1.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A self-excitation needleless injection pusher is characterized in that,
comprising the following steps:
a housing comprising a first gun body assembly (1) and a second gun body assembly (2) in sliding fit, the second gun body assembly (2) having a first position and a second position;
the injection mechanism (3) comprises an injection tube (31) and a push rod assembly (32), wherein the injection tube is arranged at the end part of the second gun body assembly (2) far away from the first gun body assembly (1) and is used for accommodating injection; the push rod assembly (32) is slidably matched in the shell and is used for pushing the injection liquid in the injection liquid pipe (31) to be injected;
an elastic member group including an energy storage elastic member (5) disposed between the second gun body assembly (2) and the push rod assembly (32) to abut against the push rod assembly (32) and an excitation elastic member (6) disposed between the first gun body assembly (1) and the second gun body assembly (2);
the locking mechanism (7) is used for locking the push rod assembly (32) when the second gun body assembly (2) is located at the first position, and unlocking the push rod assembly (32) when the second gun body assembly (2) slides from the first position to the second position against the resistance of the excitation elastic piece (6) towards the first gun body assembly (1) so that the push rod assembly (32) moves towards the injection tube (31) under the action of the energy storage elastic piece (5).
2. The self-exciting needleless injection pusher of claim 1, wherein the pusher comprises a plunger,
the locking mechanism (7) comprises:
the peripheral wall of the second gun body assembly (2) is provided with embedded holes corresponding to the steel balls (71) one by one, and the steel balls (71) are embedded in the embedded holes;
a restraining cavity (72) arranged on the first gun body assembly (1) and a conical surface (73) arranged on the push rod assembly (32); wherein, the liquid crystal display device comprises a liquid crystal display device,
when the second gun body assembly (2) is positioned at the first position, the steel ball (71) is opposite to the inner wall of the constraint cavity (72) and is propped against the conical surface (73) protruding inwards from the embedded hole to prop against the push rod assembly (32) by the inner wall of the constraint cavity (72);
during the sliding of the second gun body assembly (2) from the first position towards the second position, the steel ball (71) gradually enters and leaves the constraint cavity (72) and moves outwards under the pushing of the conical surface (73) until the push rod assembly (32) is not interfered to move towards the injection tube (31).
3. The self-exciting needleless injection pusher of claim 2, wherein the self-exciting needle-free injection pusher comprises a self-exciting needle,
the second gun body assembly (2) comprises:
an inner sleeve assembly (21) which is slidably matched with the first gun body assembly (1), wherein the energy storage elastic piece (5) is arranged between the push rod assembly (32) and the inner sleeve assembly (21);
the outer sleeve assembly (22) is sleeved outside the inner sleeve assembly (21) and is in threaded connection with the inner sleeve assembly (21), and the injection tube (31) is arranged on the outer sleeve assembly (22).
4. The self-exciting needleless injection pusher of claim 3, wherein,
the gun also comprises an anti-steel ball falling mechanism (8), wherein the anti-steel ball falling mechanism (8) is positioned in the first gun body assembly (1) and comprises a top piece (81) and an anti-falling elastic piece (82), one end of the anti-falling elastic piece (82) is connected with the first gun body assembly (1), and the other end of the anti-falling elastic piece is connected with the top piece (81); wherein, the liquid crystal display device comprises a liquid crystal display device,
-said push rod assembly (32) compressing said anti-drop elastic member (82) through said top member (81) when said push rod assembly (32) is in a locked state;
after the push rod assembly (32) is unlocked, the top piece (81) stretches to prop against the inner side of the steel ball (71) under the action of the anti-falling elastic piece (82).
5. The self-exciting needleless injection pusher of claim 3, wherein,
a bearing (9) is arranged between the inner sleeve assembly (21) and the energy storage elastic piece (5).
6. The self-exciting needleless injection pusher of claim 3, wherein,
the jacket assembly (22) includes:
a convex lens sleeve (221) provided with a lens (222);
the main sleeve (223) is assembled in the convex lens sleeve (221) and extends into the first gun body assembly (1), a perspective hole matched with the lens (222) is further arranged, and the inner sleeve assembly (21) is in threaded connection with the main sleeve (223).
7. The self-exciting needleless injection pusher of claim 6, wherein the self-exciting needle-free injection pusher comprises a hollow body,
the outer sleeve assembly (22) further comprises a positioning sleeve (224), and the positioning sleeve (224) is arranged between the main sleeve (223) and the first gun body assembly (1).
8. The self-exciting needleless injection pusher of claim 1, wherein the pusher comprises a plunger,
also included is a safety mechanism (10), the safety mechanism (10) being arranged to prevent the second gun body assembly (2) from sliding towards the first gun body assembly (1) when the safety mechanism is in the working position.
9. The self-exciting needleless injection pusher of claim 8, wherein the pusher comprises a plunger,
the safety mechanism (10) comprises:
the safety button (101) is inserted into the first gun body assembly (1) and protrudes outwards from the first gun body assembly (1);
a safety ring (102) connected to the safety button (101);
a safety elastic piece (103) arranged between the side of the safety ring (102) far away from the safety button (101) and the first gun body assembly (1); wherein, the liquid crystal display device comprises a liquid crystal display device,
when the safety button (101) is not pressed, the safety ring (102) is in a working position under the pushing of the safety elastic piece (103) and is blocked between corresponding parts of the first gun body assembly (1) and the second gun body assembly (2);
when the safety button (101) is pressed, the safety ring (102) moves against the resistance of the safety elastic piece (103) to not interfere with the sliding of the second gun body assembly (2) towards the first gun body assembly (1).
10. The self-exciting needleless injection pusher of claim 1, wherein the pusher comprises a plunger,
the injection device further comprises a cap (4), wherein the cap (4) is covered at the end part of the second gun body assembly (2) far away from the first gun body assembly (1) and covers the injection tube (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310727943.3A CN116712642A (en) | 2023-06-19 | 2023-06-19 | Self-excitation type needleless injection pusher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310727943.3A CN116712642A (en) | 2023-06-19 | 2023-06-19 | Self-excitation type needleless injection pusher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116712642A true CN116712642A (en) | 2023-09-08 |
Family
ID=87873103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310727943.3A Withdrawn CN116712642A (en) | 2023-06-19 | 2023-06-19 | Self-excitation type needleless injection pusher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116712642A (en) |
-
2023
- 2023-06-19 CN CN202310727943.3A patent/CN116712642A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11602597B2 (en) | Prefilled syringe with breakaway force feature | |
| CN1189222C (en) | Disposable safety syringe | |
| EP1755708B1 (en) | Injection device | |
| US6929622B2 (en) | Safety syringe cylinder | |
| JP4299466B2 (en) | Needle-assisted jet injector | |
| US9498578B2 (en) | Medical needle safety devices | |
| US9770558B2 (en) | Auto-injection device with needle protecting cap having outer and inner sleeves | |
| US5295965A (en) | Automatic injectors | |
| US5226882A (en) | Single-use syringe with non-retractable piston | |
| CA2127359C (en) | Automatic injectors | |
| US6699220B2 (en) | Injector pack | |
| EP0276158A2 (en) | Needleless hypodermic injector | |
| JP2018020195A5 (en) | ||
| WO2007129324A2 (en) | A disposable injecting device with auto-retraction mechanism | |
| CN113456945A (en) | Autoinjector with retracting needle | |
| US7393340B2 (en) | Disposable safety syringe including an automatically retractable needle | |
| WO2005092000A2 (en) | Needle-free single-use cartridge and injection system | |
| CN100358595C (en) | Safety shield system for prefilled syringe | |
| US20090005737A1 (en) | Auto-Injector | |
| US4878899A (en) | Disposable syringe for one-time use | |
| US20210196902A1 (en) | Needle Shield Mechanism and a Medicament Delivery Device Comprising the Needle Shield Mechanism | |
| CN116712642A (en) | Self-excitation type needleless injection pusher | |
| US20220387714A1 (en) | Emergency automatic injection device | |
| US20060089597A1 (en) | Hypodermic syringe with multi-gauge needle exchangeability | |
| US20030060758A1 (en) | Safety syringe for ergonomically coupling and inclinedly retracting used needle device into syringe cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230908 |